// @(#)root/minuit2:$Id: FunctionGradient.h 20880 2007-11-19 11:23:41Z rdm $
// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005  

/**********************************************************************
 *                                                                    *
 * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
 *                                                                    *
 **********************************************************************/

#ifndef ROOT_Minuit2_FunctionGradient
#define ROOT_Minuit2_FunctionGradient

#include "Minuit2/MnRefCountedPointer.h"
#include "Minuit2/BasicFunctionGradient.h"

namespace ROOT {

   namespace Minuit2 {


class FunctionGradient {

private:

public:
  
  explicit FunctionGradient(unsigned int n) : 
   fData(MnRefCountedPointer<BasicFunctionGradient>(new BasicFunctionGradient(n)))  {}
  
  explicit FunctionGradient(const MnAlgebraicVector& grd) : 
   fData(MnRefCountedPointer<BasicFunctionGradient>(new BasicFunctionGradient(grd))) {}

  FunctionGradient(const MnAlgebraicVector& grd, const MnAlgebraicVector& g2,
		   const MnAlgebraicVector& gstep) : 
   fData(MnRefCountedPointer<BasicFunctionGradient>(new BasicFunctionGradient(grd, g2, gstep))) {}
  
  ~FunctionGradient() {}
  
  FunctionGradient(const FunctionGradient& grad) : fData(grad.fData) {}

  FunctionGradient& operator=(const FunctionGradient& grad) {
    fData = grad.fData;
    return *this;
  }

  const MnAlgebraicVector& Grad() const {return fData->Grad();}
  const MnAlgebraicVector& Vec() const {return fData->Vec();}
  bool IsValid() const {return fData->IsValid();}

  bool IsAnalytical() const {return fData->IsAnalytical();}
  const MnAlgebraicVector& G2() const {return fData->G2();}
  const MnAlgebraicVector& Gstep() const {return fData->Gstep();}

private:

  MnRefCountedPointer<BasicFunctionGradient> fData;
};

  }  // namespace Minuit2

}  // namespace ROOT

#endif  // ROOT_Minuit2_FunctionGradient
